545
CHAPTER FOURTEEN
Blood
Type A blood
Type B blood
Type AB blood
Type O blood
Red blood cell
Red blood cell
Anti-B antibody
Antigen A
Anti-A antibody
Anti-B antibody
Red blood cell
Antigen A
Antigen B
Red blood cell
Anti-A antibody
Antigen B
FIGURE 14.21
±Dif
erent combinations oF antigens and antibodies distinguish blood types. (Cells and antibodies not drawn to scale.)
Agglutinated red
blood cells
Anti-A antibody
Red blood cell
Anti-B antibody
Antigen A
(a)
(b)
FIGURE 14.22
±Agglutination.±(
a
) IF red blood cells with antigen A are added to blood containing anti-A antibody, (
b
) the antigens react with the
antibodies, causing clumping (agglutination). (
c
) Nonagglutinated blood (210
×
). (
d
) Agglutinated blood (220
×
). (Cells and antibodies in
a
and
b
not
drawn to scale.)
(c)
(d)
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